What is Computer Vision Syndrome?

Alberto Luna

Written 26 days ago

6 minutes

Computer Vision Syndrome
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Over the past three decades, we’ve gone from having almost no computers to billions of people using screens daily—for work, study, or leisure.

Screens have become an integral part of our lives, but could this extended screen time cause long-term damage to our eyes? The answer is yes, but it’s more complex than it seems. One condition that has raised concerns among specialists is Computer Vision Syndrome (CVS).

What is CVS?

First, it’s essential to clarify that CVS isn’t a single condition or disease. Instead, it’s a group of vision-related problems caused by prolonged screen use. Below are the main contributing factors:

Reduced Blinking

A lot of eyes blinking
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Reduced or incomplete blinking can lead to dryness and irritation in the eyes. This issue often arises because of the intense focus we maintain on screens, particularly when the content is dynamic or highly engaging.

Even when we blink while using screens, studies suggest these blinks are frequently partial or incomplete. This means the eyelids don’t fully close, preventing the eyes from being properly lubricated.

Blue Light Exposure

Two screen emitting blue light
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Blue light isn’t inherently bad—in fact, it’s essential and has several benefits. For example:

  • Alertness: Blue light suppresses the production of melatonin, helping us stay awake and alert.

  • Elevates Mood: It can enhance our sense of well-being.

Common Sources of Blue Light:

  1. Sunlight: The primary source of blue light.

  2. Digital Screens: LED backlights in devices emit significant amounts of blue light.

  3. Fluorescent and LED Lighting: These artificial lighting sources also emit blue light, although typically less than digital screens.

Symptoms of Excessive Blue Light Exposure:

  • Eye fatigue, dryness, and irritation, especially with prolonged screen use.

  • Overexposure to blue light in the evening suppresses melatonin production, confusing your brain and affecting your sleep quality.

Preventing and Treating Computer Vision Syndrome (CVS)

A collage of prevetion against the CVS
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Prevention:

  1. Adjust Screen Brightness: Ensure your screen brightness matches your surroundings to avoid excessive strain.

  2. Optimize Contrast: Adjust contrast levels for comfortable reading during extended screen use. Software programs can automate this process.

  3. Follow the 20-20-20 Rule: Look at something 20 feet away for 20 seconds every 20 minutes to relax your eye muscles.

  4. Blink Often: Remind yourself to blink frequently. Apps like EyeD or Blinkzilla can help.

  5. Correct Vision Problems: Schedule regular eye exams and wear prescribed eyeglasses or contact lenses. Uncorrected vision problems can exacerbate CVS symptoms.

Treatment:

  1. Artificial Tears: Use preservative-free eye drops to lubricate your eyes, especially if dryness is severe.

  2. Warm Compresses: Applying a warm compress to your closed eyelids can soothe dryness and irritation.

  3. Seek Medical Attention: If symptoms persist or worsen, consult an eye doctor to rule out other underlying conditions.